Fetch a single MusicBrainz entity (artist, release, recording, release-group, label, work, area, place, event, instrument, series, genre, url) by its MBID. Use inc to pull linked sub-entities and relationships, e.g. inc: ["releases","release-groups"] on an artist, or ["recordings","labels"] on a release, or ["artist-credits","url-rels"] on most entities. Read-only. Data from MusicBrainz (https://musicbrainz.org), the open music encyclopedia.

Search a MusicBrainz entity type with a Lucene query and get back ranked matches with their MBIDs. Plain text matches the entity name; fielded Lucene also works, e.g. artist:"Miles Davis" AND country:US, release:"Kind of Blue" AND format:Vinyl, or recording:"So What" AND dur:[540000 TO 560000]. Feed a returned MBID into musicbrainz_lookup for full detail. Read-only. Data from MusicBrainz (https://musicbrainz.org), the open music encyclopedia.

List all entities of one type directly linked to a given entity — e.g. every release by an artist (entity: "release", linkedBy: "artist", mbid: ), recordings on a release, releases in a collection, or events at a place. This is the complete, paged set for a relationship (unlike search, which ranks fuzzy matches). Use inc for extra detail and limit/offset to page (max 100/page). Read-only. Data from MusicBrainz (https://musicbrainz.org), the open music encyclopedia.

Fetch Cover Art Archive image metadata for a release or release-group MBID — front/back cover URLs, thumbnails, and image types. Returns the image URLs (you can open or download them); it does not embed the bytes. Errors clearly when no art exists for the MBID. Read-only. Data from MusicBrainz (https://musicbrainz.org), the open music encyclopedia.

Turn a musicbrainz.org URL (e.g. https://musicbrainz.org/artist/ or /release-group/) into the underlying entity by extracting its type + MBID and looking it up. Handy when a user pastes a MusicBrainz link. Pass inc to include linked sub-entities. Read-only. Data from MusicBrainz (https://musicbrainz.org), the open music encyclopedia.

Confirm the MusicBrainz API is reachable (and our User-Agent accepted) by looking up a stable entity, and report whether the OAuth write path is configured. Reports {ok, reachable, oauth_configured} with a plain-English hint. Read-only.

Apply user tags to a MusicBrainz entity on YOUR account (needs OAuth: MUSICBRAINZ_OAUTH_* with the tag scope). Default vote: upvote adds the tags; downvote opposes them; withdraw removes your vote. Without confirm: true it returns a dry-run preview (the exact XML) and makes NO network call; with confirm: true it submits. Data from MusicBrainz (https://musicbrainz.org), the open music encyclopedia.

Set YOUR rating for a MusicBrainz entity (needs OAuth: MUSICBRAINZ_OAUTH_* with the rating scope). Rating is 0–100 (MusicBrainz shows it as 1–5 stars in steps of 20; 0 removes your rating). Without confirm: true it returns a dry-run preview and makes NO network call; with confirm: true it submits. Data from MusicBrainz (https://musicbrainz.org), the open music encyclopedia.

Add or remove entities (releases, artists, recordings, release-groups, works, labels, places, areas, events) in one of YOUR MusicBrainz collections (needs OAuth: MUSICBRAINZ_OAUTH_* with the collection scope). Get the collection MBID from its URL (musicbrainz.org/collection/). Without confirm: true it returns a dry-run preview and makes NO network call; with confirm: true it applies the change. Data from MusicBrainz (https://musicbrainz.org), the open music encyclopedia.